PDL::Audio::Scales - Over 1200 musical scales in PDL format.

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PDL::Audio::Pitches - All the standard musical pitch names.

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This module defines (and exports by default(!)) all standard pitch names: "cdefgab" with trailing octave, e.g. "a4", "g3", "c0", "a8", "interleaved "f" and "s", e.g. as4", "bf3", "fs6"....

PDL::DSP::Windows - Window functions for signal processing

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This module provides symmetric and periodic (DFT-symmetric) window functions for use in filtering and spectral analysis. It provides a high-level access subroutine "window". This functional interface is sufficient for getting the window samples. For ...

PDL::DSP::Fir::Simple - Simple interface to windowed sinc filters.

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At present, this module provides one filtering routine. The main purpose is to provide an easy-to-use lowpass filter that only requires the user to provide the data and the cutoff frequency. However, the routines take options to give the user more co...